Current-collecting device.



T. w. VARLEY. .cunmzm couecn'ue DEVICE. APPLIQATION FILED IIAY H1911.

1,267,342. Patented mm WITNESSES: mvENToR pressure of the brushes on the commutator cylinder, and, in order to observe this, I

. UNITED STATES {PATENT OFFICE.

THOMAS w. VARLEY, or NEW YORK,- N. Y.,' ASs'IGNon T0 WESTINGHOUSE ELECTRIC AND MANUFACTURING COMPANY, A CORPORATION OF PENNSYLVANIA.

CURRENT-COLLECTING DEVICE.

Specification of Letters Patent. Patented lIay 21, 1918.

Original application med October 3,1913, Serial No. 793,123, (new rarest-m. 1,334,976, dated July 31, 1917.) Divided and application filed June 5, 1916, Serial NO. 101,716. Divided and this application filed May 7, 1917. Serial No. 167,082.-

To all to hom 25 may concern:

Be it known that I, THOMAS W. VAR'LEY, a citizen of the United States, and a resident of New York in the county of New York and State of New York, have invented a new and useful Improvement in Current-CollectingDevices, this application being a division of application Serial No. 101,716, filed June 5, 1916, that is a division of application Serial No. 793,123, filed October 3, 1913,

which resulted in Patent No. 1,234,976, is-

sued July 31, 1917.,

My invention relates to current-collecting devices andparticularly to brush devices for motor-meters.

One object of my invention is to provide a current collecting or brush device that shall have a visible means for indicating the creasing the energy loss that is caused by vii'riction of the moving parts.

In view of this, it is desirable to observe the relative provide a relatively short stifi' memberthat is adapted to be supported by the same memher that supports the brush and to be normally in alinement therewith. Thus, when the brush is pressed against the commutator, cylinder, the angle between the relatively stiff member and the brush serves to indicate the relative pressure of the brush on the commutator cylinder.

In the accompanying drawings, Figure 1 is a side view, partially in section and par tially in elevation, of a portion of .a-motormeter embodying my invention, Fig. 2 is a top plan view of the brush device" shown in Fig. 1 of the drawings, and Fig. 3 is a fragmentary view of the brush device illustrat ing the position of the elements under condition of tension.

The motor-meter 1 comprises, in general,

a shaft 2 upon whioh'are mounted an armature 3 and a commutator cylinder 4, -and a brush device 5 thatis adapted to cooperate with the commutator cylinder.

Thebrush device 5 comprises two sets of brushes 6 and 7 that are mounted-at the ends of resilient members 8 and'9 which are supported by pivotally-mounted blocks 10 and strips that are bent at their ends, are attached to the pivotallymounted blocks 10 and 11, respectively, and are normally in direct alinement with the resilient supporting members 8 and 9 of the respective brushes.

In order to determine the relative pressure of the brushes 6 and 7 on the commutator cylinder 4:, it is only necessary to observe the angular relation between the guide members 19 and 20 and the respcctive resilien'tsupporting members 8 and 9. That is, ifthc brushes are not pressed against the commutator cylinder 1, the resilient members 8 and 9 will remain in direct alinement with their respective guide members. However, if the blocks 10' and 11 are so turned, by adjusting the nuts 13 and 14, that excessive pressure is exerted 011 the commutator cylinder 1, the resilient members 8 and ,9 will assume a somewhat bowed shape and the angular relation between the members 8 and 9 and the respective guide members 19 and 20 willbe an'indication of. the relative pressure exerted on the commutator cylinder.

WVhile I have shown my invention in its preferred form, it will, of course, be understood that the changes in the size, the shape and the construction may be made without departingfrom the spirit and scope of the invention as set forth in the appended claims.

I claim as my invention:

- 1. A current-collecting device comprising a brush, a relatively stifi' member, and a supporting member adapted to support the said brush and the said relatively stiff member normally in alinement, said relatively stiff member being relatively shorter than the brush.

2. A current-collecting device comprisingher, and a supporting member adapted to so supportv the brush and the relatively stiff ber being sddislo'osed with respeetvto the brush that the'relative tension of the brush may be observed by observing the relative position of the brush with respectto the stiff member.

4. Ina motor, the combination with a commutator cylinder, of a brush having a relatively stifi' member normally in alinement therewith and relatively shortertha-n the brush and a single member for sup orting the said brush and the said relatively etifl member.

7 5. A current-collecting device comprising a contact member, means for reslhently supporting the same, and a relatively short; .stlif member normally 1n alinement with thesaid resllient supporting means and adapted a resiliently-mounted contact member, a relatively short stifl' member normally in alinement with the contact member, and a single means for supporting the said members; said short stifi' member being adapted to indicate, by the difference in alinement with the 'contact member, the relative pressure being exerted by the contact member. v

In testimony whereof, I have hereunto subscribed my name this THOMAS W. VARLEY. I

2nd day of May an 

